| Quantity | Value | Units | Value | Units |
| <Z/A> | 0.49014 | |||
| Density | 2.53 | g cm-3 | ||
| Mean excitation energy | 108.3 | eV | ||
| Minimum ionization | 1.692 | MeV g-1cm2 | 4.282 | MeV cm-1 |
| Nuclear collision length | 61.3 | g cm-2 | 24.24 | cm |
| Nuclear interaction length | 90.0 | g cm-2 | 35.58 | cm |
| Pion collision length | 88.4 | g cm-2 | 34.93 | cm |
| Pion interaction length | 121.7 | g cm-2 | 48.12 | cm |
| Radiation length | 35.46 | g cm-2 | 14.02 | cm |
| Critical energy | 65.67 | MeV (for e-) | 63.85 | MeV (for e+) |
| Molière radius | 11.45 | g cm-2 | 4.526 | cm |
Plasma energy ![]() |
32.09 | eV | ||
| Muon critical energy | 881. | GeV |
| Elem | Z | Atomic frac* | Mass frac* |
| 5 | |||
| 8 | |||
| 12 | |||
| * calculated from mass fraction data. | |||